Elevator



(No Model.) 3 Sheets-Shet 1.

P. SCHMIDT. ELEVATOR.

No. 466,188. Pat canted Dec. 29, 1891.

v (No Model.) 3 Sheets-Sheet 2.

' P. SCHMIDT.

4 ELEVATOR. No. 466,188. Patented Dec. 29, 1891.

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P. SCHMIDT. ELEVATOR.

No. 466,188. Patented Dec. 29,1891.

TOR 4) 6 ATTORNEYJV" mom-mam. WASHINETON. o. c.

NITED' STATES PATENT OFFICE.

PHILIPP SCHMIDT, OF LA OROSSE, VISCONSIN.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 466,188, dated December29, 1891.

Application filed August 4, 1891- $erial No. 401,683- (No model.)

To all whom it may concern.-

Be it known that I, PHILIPP SCHMIDT, of La Crosse, in the county of LaCrosse and State of \Visconsin, have invented new and usefulImprovements in Elevators, of which the following is a full, clear, andexact description.-

This invention relates to improvements in passenger and freightelevators, and has for its object to furtherimprove the construction ofthe elevator patented by me July 15, 1890, No. 432,443, whereby saiddevice is rendered safer and stronger, as well as more convenlent tocontrol. Said additional improvements consistin the provision ofsafety-clamps which prevent the frame from spreading; in improvedlocking-arms that retain the platform or cage at any desired point ofelevation and which from their form of construction are adapted to bemade of metal cheaply; and they furthermore consist in the provision ofa safety-brake for the platform or cage which is designed to be operatedby foot-pressure and enable the operator to instantly arrest theelevator-platform, the invention further consisting in the constructionof parts and their combination with previously-patented features, as ishereinafter described, and indicated in the claims.

Reference is to be had to the accompanying drawings, forminga part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a broken front elevation of the elevator with the partsadjusted to retain the platform in locked condition. Fig. 2 is apartly-broken vertical section on the line 2 2 in Fig. 1. Fig. 3 is avertical section of the upper portion of the elevator-frame and also ofparts attached to the elevator-platform, taken on the line 3 3 inFig. 1. Fig.4 isa detached perspective view of a composite locking-armwhich is one of the features of the present invention. Fig. 5 is areversed plan view, partly in section, taken on the line 5 5 in Fig. 1.Fig. 6 is a view of one side of the rectangular elevator-platform, partsattached thereto, and a frame-stanchion shown broken, taken opposite thearrow 6 in Fig. 7; and Fig. 7 is a broken front elevation of the devicesimilar to Fig. 1, showing the platform and its controlling mechanisminunlocked adj ustment.

.To clearly distinguish the features of additional improvement fromthose embodied 1n Patent No. 432,443, abrief description of the latterwill be given.

The frame of the elevator consists of two vertical stanchions A, thatare spaced apart to admit the free travel between them of theelevator-platform B, said uprights being held together above by across-beam A. Opposite tongues a are formed on or secured to the innerfaces of the vertical stanchions A, which are engaged loosely by twogrooved uprights B of the rectangular platform B, which are heldparallel and separated by a transverse bar Z). A heavy weight 0 issuspended from the loose pulley (Z by a rope O, that hoists the platform13. Two plates 0', which are fastened to the weight at their lower ends,loosely embrace the cross-barb and have their upper ends held spacedapart by transverse bolts 0*,

to one of which the rope O is secured, so that a draft on the rope willfirst elevate the weight 7 until it engages the lower side of thecrossbar before the platform is raised, the plates 0 being guided by thepieces o that are affixed to the cross-bar b. At the center below theplatform B a bracket-frame d, having two parallel depending limbs cl inplate form, 1s secured thereto, said limbs being vertically slotted ashort distance to receive a transverse bolte, which latter is thefulcrum and connection of two composite locking-bars D. The peculiarconstruction of the lockingbars mentioned is one of the features of thepresent invention, and, as shown, each consists of two metal plates g,that are held spaced apart at one end by the pivot-bolt g of a looseanti-friction roller g and at the other end by a presser-foot that iscomposed of two angle-plates g secured between the ends of plates g andtogether by transverse bolts or rivets 9 (See Fig. 4.) The locking-barsD have one member g of each inserted between the pair composing theother bar, and when in position, as shown in Fig. 1, are pivoted aboutmidway between their ends upon the f ulcrum-bolt e, the rollers gbearing upon the lower surface of the platform B. The locking-bars D aresustained in position by two parallel bars 1', that are pivoted at oneend of each to the hanger-brackets 1'. These bars lapping upon theexterior faces of the depending limbs d are oppositely andlongitudinally slotted where they have contact with said limbs, so as topermit the fulcrumbolt 6 to be inserted through them and loosely retainthe parallel bars, locking-bars, and hanger-limbs connected when a nut cis placed on the threaded end of the bolt c. A spacing-bolt 7t (shown inFig. 2) retains the opposite ends of the parallel bars 2' properlyseparated, and at this end of the joined bars two suspension-rods 7; areattached loosely to the spacing-bolt 7.1, which rods extend vertically,having sufficient length to project above the cross-barb, their upperterminals being connected by a transverse yoke W. A tripping-lever m,which is pivoted to rock upon a block m at a point about midway betweenthe hanger'plates c and yoke 71: has its upper edge loosely engaged withthe yokes lower edge, the opposite end of the lever having a pendentcord 76 attached thereto, and on the lower end of this cord a weight It"is hung. The lever m passes between the hanger-plates c and has its topedge in contact with the lower transverse bolt 0 so that the weight 0will be adapted to rock the lever on the block on and elevate theparallel bars i at their ends where the rods are attached to them. Theoverweight of the ends of the locking-bars D, whereon the presser-feetare aflixed, causes these ends to be depressed by gravity when thehoisting-rope O is drawn upon, the inclination of said bars removing thepresser-feet from contact with the inner surfaces of the stanchions A,whereon they bear forcibly when the rope is slackened or broken, and theweight 0 falls into the position shown in Fig. 1;

The manner of connecting the composite metallic locking-bars D with thetripping-lever m by providing the suspension-rods 7t and yoke k is a newfeature of construction. Upon one of the parallel bars 2', near its freeend, an upwardly-extending link at is loosely attached by its lower end,the upper end of which link hooks fast to an end of a brakelever 17.,that is pivoted upon an arm n on the edge of the platform B, asrepresented clearly in Fig. 6, so that a depression of the end a of thebrake-lever will vibrate the parallel bars 2 upwardly and cause thelockingbars D to engage their presser-feet with the stanchions A. Thisbrake mechanism is also a feature of additional improvement for theelevator. At 0 an upwardly-extending cord 0 is attached to one of theparallel bars t', which cord passes through the platform 13 and 'over apulley 0 terminating (see Figs. 1 and 7) in a handle, which when pulledwill vibrate the bars 1' and stop the platform. There is a rope 19attached to the center of the yoke 7L2 and extended upwardly to engage asheave p" at the top of the elevatoi frame, and thence to a pulley on astanchion A of the frame, thence downwardly to the lower portion of theelevator, said rope being provided to afford means for arresting theplatform B by draft strain upon it, which may be produced exterior ofthe platform.

In elevators having stanchions A, as herein described,it has been foundthat such portions of the elevator-frame, if of considerable height, areliable to be spread apart when a heavy weight is imposed upon theplatform B. To avoid this contingency, side strips r are allixedoppositely on the stanchions near their inner faces, which strips extendthe entire height of the stanchion from their lower ends. The verticalstrips 0' afford lockingribs, which are loosely engaged by the hookedends 3 of the safety-clamps s, which are bent around the stanchions andalso embrace the grooved uprights B, to which they are affixed. Theseclamps, which are normally free to slide on the ribs 0, will engagetherewith if the stanchions are inclined to spread apart, and thus serveto prevent accidents that might re sult if the guiding connectionbetween the platform and elevator-frame was destroyed by the swerving ofthe stanchions. The safetyclamps s, which are located above the platformB, are supplemented in their service by other safety-clamps it, that arehung from the platform by hanger-bars u, and thus supported horizontallybelow it, their ends hav: ing lateral hooks produced on them, as at toin Fig. 5, which hooks loosely bear upon the outer edges of the verticalribs 7, while the stanchions A are vertical and parallel. There aretransverse stay-bolts a introduced between the horizontal safety-clampsu at a proper distance apart and from their hooked ends n whereby theclamps are retained from lateral displacement and the connected partsrendered substantial without objectionable weight.

The safety clamping devices just described constitute another feature ofthe present improvement, which materially increases the safety of theelevator.

In service the breaking of the hoisting-rope C, which is attached tosupports of the weight a, will release said weight, and its speedy fallwill vibrate the tripping-lever m and cause the locking-bars D to bespread apart and engage with the stanchions A, as before ex plained, thesupplemental weight k assisting the vibration of the lever m, from whichit is suspended.

Having thus describedmy invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. In an elevator, the combination, withparallel locking-bars pivoted below the elevator'platform and adaptedwhen spread apart to lock the platform fast to its upright supports andparallel vibratable bars controlling the divergence of the locking-bars,of a brake-lever located on the elevator-platform and connected to saidparallel bars, sub stantially as described.

2. In an elevator, the combination, with parallel vertical stanchions, avertically-movable platform having a hoisting-rope, parallel compositelocking-bars, each having a pivoted roller at one end and a presser-footat the opposite end, parallel vibratable bars pivoted at one end tobrackets secured to the under side of the elevator-platform, and atransverse fulcrum-bolt for said bars, of a brakelever pivoted on theelevator-platform and a link connecting one end of said lever with oneend of said parallel bar, substantially as described.

3. In an elevator, duplicate locking-bars adapted to secure theelevator-platform to an upright supporting-frame and release it, asrequired, each bar consisting of two metallic plates held spaced apartat one end by the pivot-bolt of a roller and at the other end by apresser-foot composed of two angle-plates fastened to the main plates byspacing-bolts, substantially as described.

4. In an elevator, the combination, with pivoted locking-levers belowthe elevatorplatform, vibrating bars controlling the locking-bars, and apivoted tripping-lever, of the suspension-rods 7t, having their lowerends secured to the vibrating bars, the yoke k secured to the upperlendsof the rods and adapted to be engaged by the tripping-lever,

and a rope p, secured to the said yoke and passed over guide-pulleys andthence down to the lower portion of the elevator, substantially asherein shown and described.

5. In an elevator having a vertically-movable platform or cage andparallel vertical stanchions joined together at the top, a safetyclamping device comprising two upper clamping-plates on the frame of theelevator-cage, adapted to hook onto vertical ribs on the stanchions, andtwo lower clamping bars hung from the platform of said cage andalsoadapted to hook onto said ribs, substantially as described.

6. In an elevator, the combination, w1th parallel stanchions and avertically-movable platform or cage, of the clamp-bars a, suspended fromthe platform and provided with hooks at their ends engaging thestanchions, and stay-bolts u secured to and connecting the clamp-bars,substantially as herein shown and described.

PHILIPP SCHMIDT.

Witnesses:

T. J. BARNEY, PETER RIENHOLZ.

